Global warming: What would be the temperature of Earth without Carbon Dioxide?

Without water vapor the Earth freezes into a giant snowball in a matter of weeks; without CO2, it would take a few years, but it would also freeze over, probably in no more than a decade.

You can see model results that show this in "Principles of Planetary Climate" by Raymond Pierrehumbert, as well as other places.

EDIT: While I think that book covers it too, the actual figure I remember was from an article by Pierrehumbert in the book "The Global Circulation of the Atmosphere" edited by Tapio Schneider and Adam Sobel, sorry for the error. For fans of Richard Lindzen, he's co-author on another chapter in the same book.

So somewhere under 0 C.

No way to measure that.

There wudnt be anyone here to take readings. No plants, animals , even liberals.

Without CO2 the entire physical construct wud be totally alien.

Our atmosphere has a mix of nitrogen and oxygen (78% and 21% respectively) with trace amounts of water vapor, carbon dioxide and other gaseous molecules. What’s more, we enjoy an atmospheric pressure of 101.325 kPa, which extends to an altitude of about 8.5 km.

Without CO2, there would be no temperature change in the atmosphere.

very hot

About 30 degrees colder than it is now. Without carbon dioxide, the water vapor would condense, and the oceans would turn to ice. The continents would remain bare, as it would be too cold to snow.

It should be a few degrees cooler. The effects aren't known exactly. For example, even if we could calculate the decrease in energy to the system, the colder temperature might cause other effects such as increased albedo and changes in clouds that aren't easily predicted. There are other things that can't be known as well. Climate isn't as easily understood and predicted as some people claim so instead of admitting we don't know, they pretend to know so that they can use it for their petty politics.

You notice Dirac and his doppelganger Jim pretend to be experts. They are experts on their ecofascist propaganda and little else. The stupidest among us are those that think they know things they are clueless about. Unlike them, I actually studied hard to earn a geology degree. Their degree (an honorary degree) is in anti-capitalist propaganda.

Absolute Zero.

with out Carbon Dioxide plants would not survive and without plants no Animals.

Earth would be a barren Rock.

Roughly the same as it is now.

The greenhouse gases just mean that heat is retained longer before being radiated outwards, and the earth is in the goldilocks zone, so water would not freeze over the whole planet (it would stay around an average of roughly 20 degrees Celsius.

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